Liquid crystal display device

Abstract

A liquid crystal display device of low power consumption which exhibits high image quality is realized. To each liquid-crystal-side pixel region of one substrate out of respective substrates which are arranged while sandwiching liquid crystal therebetween, a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from the drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element, and the pixel electrode and the counter electrode are respectively formed of strip-like transparent conductive layers and are substantially alternately arranged in the inside of the pixel region.

What is claimed is:  
     
         1 . A liquid crystal display device being characterized in that: 
 a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal, and    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers and are substantially alternately arranged in the inside of the pixel region.    
     
     
         2 . A liquid crystal display device according to  claim 1 , wherein the pixel electrode and the counter electrode are respectively formed as same layers on a protective film which covers the first switching element and the second switching element, and the pixel electrode and the counter electrode are respectively electrically connected with the first switching element and the second switching element via a through hole formed in the protective film.  
     
     
         3 . A liquid crystal display device according to  claim 1 , wherein the protective film is formed of a sequential laminated body constituted of a protective film made of inorganic material and a protective film made of organic material.  
     
     
         4 . A liquid crystal display device being characterized in that: 
 a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers which are arranged approximately parallel to the drain signal line and are substantially alternately arranged in the inside of the pixel region, and    the reference voltage signal line is arranged approximately parallel to the drain signal line.    
     
     
         5 . A liquid crystal display device being characterized in that: 
 a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers which are arranged approximately parallel to the drain signal line and are substantially alternately arranged in the inside of the pixel region, and    the reference voltage signal line is arranged approximately parallel to the drain signal line and is arranged to be superposed on one electrode out of the pixel electrode and the counter electrode.    
     
     
         6 . A liquid crystal display device being characterized in that: 
 a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers and are substantially alternately arranged in the inside of the pixel region.    
     
     
         7 . A liquid crystal display device according to  claim 6 , wherein the pixel electrode and the counter electrode are respectively formed as same layers on a protective film which covers the switching element, and pixel electrode and the counter electrode are respectively electrically connected with the switching element and the reference voltage signal line via a through hole formed in the protective film.  
     
     
         8 . A liquid crystal display device according to  claim 6 , wherein the protective film is formed of a sequential laminated body constituted of a protective film made of inorganic material and a protective film made of organic material.  
     
     
         9 . A liquid crystal display device according to  claim 6 , wherein the switching element is a thin film transistor having a semiconductor layer formed of polycrystalline silicon.  
     
     
         10 . A liquid crystal display device being characterized in that: 
 a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers which are arranged approximately parallel to the drain signal line and are substantially alternately arranged in the inside of the pixel region, and    the reference voltage signal line is arranged approximately parallel to the drain signal line.    
     
     
         11 . A liquid crystal display device being characterized in that: 
 a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers which are arranged approximately parallel to the drain signal line and are substantially alternately arranged in the inside of the pixel region, and    the reference voltage signal line is arranged approximately parallel to the drain signal line and is arranged to be superposed on one electrode out of the pixel electrode and the counter electrode.    
     
     
         12 . A liquid crystal display device being characterized in that: 
 a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers on an upper surface of a protective film which is formed to cover the first switching element and the second switching element and are substantially alternately arranged in the inside of the pixel region, and    a reflection film which is held at a potential equal to a potential of the counter electrode is formed on a lower surface of the protective film over a whole region in the inside of the pixel region.    
     
     
         13 . A liquid crystal display device according to  claim 12 , wherein the protective film is formed of a sequential laminated body constituted of a protective film made of inorganic material and a protective film made of organic material.  
     
     
         14 . A liquid crystal display device being characterized in that: 
 a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the pixel electrode and the counter electrode are respectively formed of strip-like light-transmitting conductive layers on an upper surface of a protective film which is formed to cover the first switching element and the second switching element and are substantially alternately arranged in the inside of the pixel region, and    a reflection film which is held at a potential equal to a potential of the counter electrode is formed on a lower surface of the protective film over a portion in the inside of the pixel region.    
     
     
         15 . A liquid crystal display device according to  claim 14 , wherein the protective film is formed of a sequential laminated body constituted of a protective film made of inorganic material and a protective film made of organic material.  
     
     
         16 . A liquid crystal display device being characterized in that: 
 on each liquid-crystal-side pixel region of one substrate out of respective substrates which are arranged to face each other in an opposed manner by way of liquid crystal, a reference voltage signal line which is arranged to divide the pixel region in halves and first and second gate signal lines which are respectively arranged at one-side pixel region and the-other-side pixel region with respect to the reference voltage signal line in parallel with the reference voltage signal line are formed,    a first thin film transistor which is operated in response to a scanning signal from the first gate signal line, a first pixel electrode to which a video signal is supplied through the first thin film transistor, and a first counter electrode to which a reference voltage signal is supplied from the reference voltage signal line are provided to the one-side pixel region,    a second thin film transistor which is operated in response to a scanning signal from the second gate signal line, a second pixel electrode to which a video signal is supplied through the second thin film transistor, and a second counter electrode to which a reference voltage signal is supplied from the reference voltage signal line are provided to the the-other-side pixel region, and    the first and the second pixel electrodes and the first and the second counter electrodes are respectively formed of strip-like light-transmitting conductive layers on an upper surface of a protective film which is formed to cover the first and the second thin film transistors and are substantially alternately arranged in the inside of the pixel region, and    a reflection film is formed on a lower surface of the protective film over either one of the one-side pixel region and the the-other-side pixel region with respect to the reference voltage signal line.    
     
     
         17 . A liquid crystal display device being characterized in that: 
 on each liquid-crystal-side pixel region of one substrate out of respective substrates which are arranged to face each other in an opposed manner by way of liquid crystal, a reference voltage signal line which is arranged to divide the pixel region in halves and first and second gate signal lines which are respectively arranged at one-side pixel region and the-other-side pixel region with respect to the reference voltage signal line in parallel with the reference voltage signal line are formed,    a first thin film transistor and a second thin film transistor which are operated in response to a scanning signal from the first gate signal line, a first pixel electrode to which a video signal is supplied through the first thin film transistor, and a first counter electrode to which a reference voltage signal is supplied from the reference voltage signal line through the second thin film transistor are provided to the one-side pixel region,    a third thin film transistor and a fourth thin film transistor which are operated in response to a scanning signal from the second gate signal line, a second pixel electrode to which a video signal is supplied through the third thin film transistor, and a second counter electrode to which a reference voltage signal is supplied from the reference voltage signal line through the fourth thin film transistor are provided to the the-other-side pixel region, and    the first and the second pixel electrodes and the first and the second counter electrodes are respectively formed of strip-like light-transmitting conductive layers on an upper surface of a protective film which is formed to cover the first, the second, the third and the fourth thin film transistors and are substantially alternately arranged in the inside of the pixel region, and    a reflection film is formed on a lower surface of the protective film over either one of the one-side pixel region and the the-other-side pixel region with respect to the reference voltage signal line.    
     
     
         18 . A liquid crystal display device according to  claim 16 , wherein the protective film is formed of a sequential laminated body constituted of a protective film made of inorganic material and a protective film made of organic material.  
     
     
         19 . A liquid crystal display device according to  claim 16 , wherein the scanning signal from the first gate signal line and the scanning signal from the second gate signal line are supplied at different timings.  
     
     
         20 . A liquid crystal display device being characterized in that: 
 a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from a drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the reference voltage signal line is arranged approximately parallel to the drain signal line and is not connected with the pixel electrode of a neighboring pixel by way of the first switching element.    
     
     
         21 . A liquid crystal display device being characterized in that: 
 a first switching element and a second switching element which are operated in response to a scanning signal from a scanning wiring electrode, a first pixel electrode to which a voltage is supplied from a first signal wiring electrode through the first switching element, and a second pixel electrode to which a voltage is supplied from a second signal wiring electrode through the second switching element are formed on each liquid-crystal-side pixel region of one substrate out of respective substrates arranged by way of liquid crystal,    the second signal wiring electrode is arranged approximately parallel to the first signal wiring electrode and is not connected with the first pixel electrode of a neighboring pixel by way of the first switching element.    
     
     
         22 . A liquid crystal display device according to  claim 17 , wherein the protective film is formed of a sequential laminated body constituted of a protective film made of inorganic material and a protective film made of organic material.  
     
     
         23 . A liquid crystal display device according to  claim 17 , wherein the scanning signal from the first gate signal line and the scanning signal from the second gate signal line are supplied at different timings.